Muffler.



E. BIVERT.

v MUFFLER.

ArPLIoATIoN FILED Jnmz, 1912.

1,045,936. l y Patented Dec.3,1912.

Array/vif STATES PATENT OFFICE.

nuemnivnar, ,oir rumors, assisivea To saura-ervaar conraNY, or

' cnicaco, ILLiNoxs, a coaronariou or tumors.

HUFFLEB.

lpo'clcttion of Letters btent.

-V To allwhomitma concern:

, 120' of the structure?- Be it known at I, EUGENE Bivnirr, ya citizen of France, and a resident of Chicago, count o Cook, State of Illinois, have invente certainl new and useful Im rovemcnts in Muers, of which the fol owing is a specification. I v

Thev main objects of this invention are to provide an improved -form of muler of the type which is suitable for use in connect-ion vwith internal combustion or yother engines which-exhaust with' explosive violence; toprovide an im roved construction and arrangement where ythe temperature `of the ,exhaustfgaseswill dissipated during the passage of the vgases through the muilier so aste obviate all noise, without, however, obstructing the free iiow of the gases through theliiuler and to provide an improved constition of the various parts A'speeiiic embodiment of this invention is illustrated in the accompanying drawings in whiche- Figure 1 is a side elevation partly iii section., Fig. l2 is an end elevation. Fi 3 is a transverse section on the lines A-i of 'Figl ik1. Figs. 4 and 5 are details of the inner baille spacers. Figs. 6 and 7 are details of the dished members which form part ofthe inner bailles.

In the construction shown in the drawings the inuiiier comprises a pair of heads l and 2 connected b a tubular casing 8 and having arrange therein a series o inner baille disks 4 to which are opposed a series of outer bathe rings or ianges 5.

In the specificv construction shown the head 1 has an inlet opening 6 provided with a stuiling box gland whereby it may have a slip joint with the pipe to which it is connected. The head 2 has outlet opening 8, similarly provided with a slip joint.. for connection with a ipe in case it is desired to conduct the4 ex aust gases beyond the L muler. The peripheries of the heads 1 and 2 are of a diameter to t the interior of the cylindrical shell 3 and the heads are grooved y9on the outer faces so that the ends of' 'the`v shell 3 Imay be rolled inwardly to form a tght oint as will hereinafter appear. In

theheads are spanned by spiders 10 e form shown, the central openings in vided with central a ertures through w 'ch a rod 11 is passed. is rod is threaded at .Application lied January 28, 1918. Serial lo. 872,7

its ends and is secured in place b means ot.v nuts. The inner baiiles are ma e up of dished plates 12 and fiat plates 4, each perforated to receive the rod 11, and these are spaced apart in pairs as shown in Fig. 1 by means of tubular s acers 14. At each end. of the device the p ates 4 are gradually reduced in diameter so as to provide for the free ow of gases from the opening 6 through the annu ar s ace 15 between the two sets of bales an then to the outlet opening 8.

The outer baiiles 5 are shown in the form of rings havingy a large central opening of a diameter greaterthan the outer diameter of the bailes 4 to provide for the annular space 15 between the two sets of bailies. The rings are of angle section so as to provide an inwardly extending flange in the plane of the ring and a peripheral flange y16, which spaces the ring from the next adjacent one. In the form 4shown the rin are cupped metal stampings but it will readily seen that they may be varied in form, the essential characteristic being the inwardly extendin batlie walls and some means for spacing t em apart. Incidentally these spacer rings add strength to the outer casing. In assembling the construction shown, the rod 11 with a nut at one end is passed through the central opening in the spider vof one of the heads and then the inner set of baiiies is assembled thereon in themanner shown in Fig. 1. The outer set of baiiie rings is then slid one upon another on top of the inner face of the first head and into the shell 3. Then the other head is placed on top of the pile with the rod 11 passing through the spider of saidl head and the other nut ris screwed upon the rod 11 to clamp the assembled parts together. Finally the ends of the shell 3 are curled back so as to form gas tight joints at the grooves 9. f

In operation the device oiers little or no obstruction the flow of gases throu h kit since theclear passa e 15 between t e bailles is lar r in area t an the inlet openirg 6 and t e outlet opening 8, so as to a mit of a free and unrestricted iow of gases, through the muiliers, but ony account of expansion and the diffusion of the exhaust gases with the air or gases already contained in the spaces in the interior of the muiller, the hot gases from the inlet 1.10

openingf eddy into the'spaces between the baffle walls, coming in contact with sa1d baille walls which are relatively cool on account of the radiation of heat from the exterior of the muliier. are therefore gradually reduced in temperature and consequently in volume and pressure as they pass through the muiiler so that, prior to passing out of the delivery outlet 8, their pressure will have been reduced to such an extent that discharge at the outlet' 8 will be silent. e

By reason of the fact that the outer ballles are all of the same internal diameter, whereas the external diameter 'of the inner batlles.

increases successively from the inlet opening toward the middle of the muiler, it might be said that the free, passage is gradually reduced by a plurality of successive 'stagesi The number of such stages, and the amount of reduction of the area of the passage at successive stages to give the best results, depends upon the volume, pressure, and heat of the exhaust gases delivered tothe muffler from the engine and must accordingly be 'designed to suit the engine as the gases flow through the muilier. The pressure and volume of the gases are reduced by reason of the heat, which is absorbed by the bafiles and radiated from the casing.

Although but one specific embodiment of this invention is herein shown and described it will be understood that .numerous details of the construction shown may be alteredor omitted without departing from the spirit of this invention as defined by the following claims.

I claim l. A muliier comprising a casing having inlet and outlet openings at oppositev ends thereof, a series of inner battles' arranged in axial alinement in the interior of said casing, a plurality of outer bailles arranged outside of said inner baiiles and having their inner edges spaced outwardly from the outer edges of said inner baliies; to provide an unobstructed substantially straight passage extending between them from end to end of said series ofbaflles.

2. A muiller comprising a casing, a series of inner bales arranged in axial alinement in the interior of said casing, and a plurality of outer baliles arranged outside of said inner ballies in concentric relation thereto, said inner and outer baflies being spaced apart and sha ed to provide an unobstructed, substantia y straight passage extending between them from end to end of said series of baflles, and said passage being succesively reduced in transverse area in the direction of the flow of gases through the muliier. 3. A muiiier comprising a casing, a series of inner bailies arranged in axial alinement in the interior of said casing, and a plu- I The exhaust gases rality of outer baliles arranv ed outside of said inner baffles and space therefrom to provide an unobstructed substantially I straight passage between them, the individualinner and outer Vballes being located in staggered relation to each other. 4. A muiiier comprising a casing, a' of inner battles arranged in axial alinement in the interior of said casing, and a plurality of outer baffles arranged outside of said inner baliles, the inner edges of said outer baiiies being spaced radially away from the outer edges of said ballles to provide a substantially straight annular passagek for gases between them.

5.'` A muffler comprising a casing.y a series of inner baflles arranged in axial alinement in the interior of said casing, and a plurality of outer baffles arranged outside of said inner batlies, inlet and outlet openings at respectively opposite ends of said casing, and t e adjacent edges of said ballles being vspaced apart radially to provide between them an unobstructed substantially straight passage having a transverse area not less than that of said inlet opening.

6. In a muiiier, the combination of a casing having inlet and outlet openings at opposite ends, batlies arranged to impart an eddying movement to gases flowing between said inlet and outlet openings and shaped to provide openings for the direct iiow of gases past said series of baiiles, said openings being of an area notless than substantially that of said inlet opening. .A

7.. A muffler comprising a pair of heads rspaced apart and respectively provided with inlet and outlet openings, a shell connecting said heads to form therewith a closed casing, a series of inner ballles arranged axially within said casing between said heads, said baiies being smaller than the transverse area of said shell, and outer baffles spaced away from said inner baliles and co-acting therewith to cool the gases passing through said casing, said innerbaffles being successively increased in external diameter toward said outlet opening to provide successive stages of reduction of the transverse area of thepassage between said inner and outer bales. l,

8. A muler comprising a pair of heads spaced apart and res ectively provided with inlet and outlet openings, a shell connecting said heads to form therewith a closed casing, a series of inner battles arran ed axially within said casing between said baliles being smaller than the transverse area of said shell, and outer bellies spaced away from said inner baies and co-actinE l.

plates. 4

mullier comprising a pair of heads 1I spaced a art and respectively provided with inlet an outlet openings, a shell connecting said heads to form therewith a closed casing, a series of inner bailles arranged axially within said casing between said heads, said bailes being smaller than .the transverse area of said shell, and outer bales spaced away from said inner bailes and co-actin therewith to cool the gases passing throug said casing, and said outer ballles comprising a series of flanges extending inwardly from said shell and spaced apart in an axial direction.

10. A muiller comprising a pair of heads spaced a vart and respectively provided with inlet an outlet openlngs, a shell connecting said heads to form therewith a closed casn ing a series of inner bailies arranged axially wit in said casing between said heads, said 'bailles being smaller than the transverse area of said shell, and outer balles spaced away from said inner bailles and co-acting therewith to cool the gases passing through said casingsaid outer bailles being of substantially L-shaped cross-section, one leg extending radially inward and serving as a bale,

and the other leg extendin along said shell and serving as a spacer etween adjacent inwardly extending legs.

11. A muffler comprlsing a pair of circular heads spaced apart and having central openings adapted to serve respectively as inlet and outlet openings, spiders bridging said openings, a rod extending between said spiders, a series of baille disks and tubular spacers arranged along said rod, and a series of rings mounted in axial alinement between said heads and having annular flanges adaptadapted to space them apart, andan outer tubular shell surrounding said baille rings and having its. ends secured to said heads.

13. A muliler comprising a pair of circular heads spaced apart and having central openings adapted to serve respectively vas inlet and outlet openings, spiders bridging said openings, a rod extending between said spiders, a series of baille disks and tubular spacers arranged along said rod, and a series of rings mounted in axial alinement between said heads and having annular flanges adaptedto space them apart, and an outer tubular shell surroundin said baille rings and having its ends curle inward to engage said heads.

14. A muilier comprising a pair of circular heads s aced apart and having central openldished plates arranged alternately along said rod and spaced apart in pairs.

16. A mulller comprising a casing having inlet and outlet openings, a series of baiiles arranged along the path of the gases flowing between said inlet and outlet openings,l

and adapted to provide between them an unobstructed passage having successive stages of reduction, the transverse area of the passage at each of said stages being less thanat the preceding stage.

Signed at Chicago this 18th day of J anuary, 1912.

EUGENE BIVERT. Witnesses: l

EUGENE A. RUMMLER, EDWIN PHELPs. 

